The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2007
Filed:
Dec. 04, 2002
Monica Bokström, Koviand, SE;
Per Åström, Kovland, SE;
Monica Bokström, Koviand, SE;
Per Åström, Kovland, SE;
Metso Paper, Inc., , FI;
Abstract
A system for treating pulp comprises a dewatering device () for dewatering the pulp to a fiber concentration of at least 20%, a closed pulp-shredding vessel () for shredding the dewatered pulp, and an outlet pipe () from the pulp-shredding vessel. A transport screw () is arranged in the outlet pipe for transporting the shredded pulp from the pulp-shredding vessel through the outlet pipe through a reactor vessel () for bleaching the shredded pulp through reaction with ozone gas. The outlet pipe () is designed with a heightened roof portion (), so that an upper gas space () free from pulp is formed in the outlet pipe between the roof portion and the transport screw. A flow-restraining member in the form of a partition wall () is arranged in the upper gas space in the outlet pipe for restraining the gas flow through the gas space, whereby the pumping action of the transport screw in the outlet pipe is decreased.